Ore-concentrator



2 Sheets-Sheet 1.

(No Model.)

J. H. MILLER. ORE GONGENTRATOR.

Patented Dec. 30,1890.

a n N- a 1 a m w. A w m m o u F a c s n z 1 z r m a a u M (No Model.) 2Sheets-Sheet.

J. H. MILLER. ORB GONGENTRATOR.

No. 443,836. Patented Dec. 30, 1890.

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UNITED STATES PATENT OFFICE.

JOHN H. MILLER, OF SAN J OSE, CALIFORNIA.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 443,836, dated December30, 1890. Application filed December 16, 1889. Renewed October 13,1890.Serial No. 368,006. (No model.)

To all whom it may concern.-

zen of the United States, residing in the city of San J os, county ofSanta Clara, and State of California, have invented certain new anduseful Improvements in Ore-Concentrators, of which the following is aspecification.

These improvements in ore-concentrators relate to machines of that classin which the concentrating surface is an endless traveling apron havingcontinuous movement over a bed of rollers and also a vibrating orshaking motion during progression; and the improvements includean'endless carrier of bars or slats placed under the apron and adaptedto support and carry it over the rollers, a vibrating bed andspring-standards of novel construction, and a general combination ofparts and mechanism producing an ore-concentrator of improved character.

The nature of these improvements and the manner in which 1 haveproduced, applied, and carried out the same will be fully understoodfrom the following description and the accompanying drawings.

Figure 1 represents the machine in side elevation, the view being takenfrom the lefthand side, looking from the head of the machine. Fig. 2 isan elevation of the opposite side. Fig. 3 is a top View with a portionof the apron and endless carrier broken away at one end to show theparts beneath. Fig. 4: is a vertical cross-section on a smaller scalethrough the shaking bed, just in front of the middle set ofspring-standards. Fig. 5 illustrates another construction of shakingmechanism as a substitute for the double-crank shaft.

A indicates the shaking bed, and B B the rollers upon which theconcentrating-apron 0 travels. Between the apron and its carryingrollersis interposed an endless carrier formed of narrow bars or slats D, fixedto endless chain belts D Dfiand arranged to be carried and driven bysprocket-wheels E E at the head or upper end and the tail or lower endof the machine. I

The bed-rollers are mounted in boxes d d on the upright sides A of thebed, and their faces are set in the same plane; but in place of thelarge end rollers or drums, as they are generally called in thesemachines, there are tion is given to one of the shafts F bysprocket-wheels J J chain belt I, and the counter-shafting H 11 .11 andcone-pulleys K K that are seen in Figs. 2 and 3. This mechanism controlsthe progressive movement of the concentrating-apron and enables thespeed to be regulated, as the character or condition of the materialbeing worked may require, without interrupting the operation of themachine. Its cone-pulley K is on the principal shaft, and gives motionto a fellow pulley K by the connecting-belt L, which is set at differentpoints to change the speed by a belt-shifter M and a hand-lever M Thecone-pulley shaft H is connected by counter-shaft H and gearing with theshaft H carrying the pulley J while the principal shaft is driven from amotor-shaft by a belt and pulleys, of which the one on the principalshaft is seen at G*. A balance-wheel Y is fixed on this shaft.

The shaking bed is shaped like a trough or box, but with open ends, andits upright sides A are of suitable height to bring the bedrollers asuitable distance above the bottom for the apron and its endless carrierof slats to pass under clear or Without dragging on the bottom of thebed. For a long apron a roller P will be necessary under the lower side.

The vibrating or shaking motion of the apron is a complex motion, inbeing a combination of longitudinal and transverse movements, and thespring-standards R, that support the bed, are therefore of peculiarconstruction, in order to yield and have elastic qualities in twodirections. These standards are formed of round steel rods with two bowsorv loops R R near the foot or lower end, one of which is set at rightangles to the other, but both in vertical planes. The ends of each rodare secured in sockets R B, one on the stationary frame and the other onthe bed A, in which position the rod is so set that one loop R is inline with the longitudinal motion and the other loop with the transversemotion, the corresponding loops in the whole setof standards standing inthe same direction. Standards of such construction will be foundserviceable for a long time without breaking or losing their elasticity.

The rock-shaft U, with an arm U produces thelongitndinal motion of thebed, the eccentric S on the principal shaft gives the transverse motion,and the two acting together produce a complex vibratory motion that is aresultant of the two single motions. A connecting-rod V extends from thearm of the rock-shaft to the side of the bed, where it is attached byuniversal joint and the rock-shaft is moved from the principal shaft bya crank pitman IV, and the arm U on the shaft. The eccentric S moves asecond rock-shaft S having arms T T, the eccentricrod S being connectedby universal joint S to one arm of the rock-shaft, while the rods T Tfrom the arms T extend under the bed to the opposite side, where theyare attached by loose joints to straps on the side of the bed A.

By the construction represented in Fig. 5 the rock-shaft S withconnected parts, can be dispensed with, and in such modification the bedis attached by the bars or links T at one side to points i on astationary side rail Y extending along one side of the bed and fastenedto the uprights X of the stationary frame. At these points the side railhas curved outsetting portions 1' with spaced holes to take thepivot-bolts of the links, and the two links thus attached by pivots,both to the bed and to the side rail, are set parallel with each otherand are of equal length. By virtue of this connection it will be seenthat as the rock-shaft U gives longitudinal motion to the bed thevibration in such direction is changed and so modified by the parallellinks that the bed moves sidewise and the motion pat-takes of bothcharacters.

The endless-carrier slats are narrow bars of wood with their top facesrounded to give a smooth curved surface in passing around the s1n-ocket-wheels, and they are fixed at regular distances apart upon twoendless chain bolts that travel on an d are driven by sprocketwheels.The slats set directly upon the bedrollers to carry theconcentratingapron, and the rollers are cut away or reduced in diameterat the end portions 1) corresponding to the width and thickness of thecarrier-chains to bring the bottoms of the slats against the rollers B.The concentrating-apron can be considerably reduced in weight andthickness, and a canvas apron can be used to advantage in place of themore expensive rubber apron. This endless carrier also increases thedurability of the apron.

Raised edges of rubber can be applied to a canvas body in forming theapron for this concentrator.

Suitable water and pulp feeding devices are placed at the head of themachine, and a sluice for the tailings is also set under the tail of theconcentrating surface; but these necessary parts are already in commonuse in conthe endless link belts on which the slats are secured, incombination with sprocket-wheels driving the belts and bed-rollerssupporting said carrier, said bed rollers having the reduced ends forreceiving the link belts, the sprocket-wheels and bed-rollers beingmounted in a vibrating bed, substantially as herein described.

2. I11 combination with the endless apron of an ore-concentrator, anendless carrier composed of spaced slats having rounded top faces andfastened at theirouter ends to endless chain belts, the sprocket-wheelsand bedrollers by which said carrier is supported and driven, saidbed-rollers having the reduced ends for receiving the endless chainbelts, the bed or trough mounted on springstandards, and means whereby acontinuous progressive movement is given to said carrier and a vibratorymovement is imparted to the bed or trough.

3. In combination with a vibrating bed mounted on spring-standards forcarrying the endless apron or concentrating surface, mechanism wherebycurvilinear vibratory motion is imparted to the bed, consisting of therockshaft having an arm with a connecting-rod attached to the bed at oneside for giving longitudinal vibration, and the transverse rods orlinks, which are pivoted at one end to the bed at one side and areattached at the other end to pivots outside the bed for givingcurvilinear motion in a lateral direction, substantially as hereindescribed.

4.. In combination with the vibrating bed, the main driving-shaft G,secondary shaft II, counter-shaft I1 geared into the secondary shaft andthe apron-driving shaft II", the sprocket-wheels and belt I J J and theconepulleys K K and belt-shifter, arranged for operation as set forth.

5. A spring standard or leg for vibrating beds of ore-concentrators,formed of cylindrical rod or wire with loops or bows standin gsubstantially at right angles to each other, as herein described.

6. In combination with the vibrating bed of an ore-concentrator, springlegs or standards fixed in supports at the ends to a stationary base andto the bed, having double loops or bows standing in different planes atright angles to each other, as herein described.

In testimony that I claim the foregoing I have hereunto set my hand andseal.

JOHN H. MILLER.

lVitncsses:

CHAS. E. KELLY, EDW'ARD E. Osnonn.

